层状双金属氢氧化物/壳聚糖复合膜的制备与性能研究

Study on the Preparation and Properties of M-LDHs/Chitosan Hybrid Films

用改性层状双金属氢氧化物(M-LDHs)与壳聚糖(CS)溶液共混,制得了具有阻隔性的可降解M-LDHs/CS复合膜。通过X射线衍射、红外光谱和原子力显微镜对复合膜进行结构表征,并对复合膜的气体阻隔性能、透光性能与拉伸性能进行了测试。结果表明:当w(M-LDHs)∶w(CS)为10∶100时,复合膜的氧气阻隔性能最佳,比纯CS膜提高了42%;当w(M-LDHs)∶w(CS)为15∶100时,拉伸强度最大,而断裂伸长率却有所下降。

Modified layered double hydroxides/chitosan（M-LDHs/CS） hybrid films are prepared by cosolution method, which is a kind of degradable barrier films. The structure of the films is characterized by XRD, FT-IR and AFM, the gas barrier, optical, and mechanical properties of films are tested. The results show that the oxygen barrier property is best when the w（M-LDHs） ： w（CS） is 10 ： 100, which has been raised 42 % compared with pure chitosan film; the tension strength is up to the maximum when the w（M- LDHs） = w（CS） is 15 ＂. 100, but the breaking elongation is declined.